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參數(shù)資料
| 型號： | L7581 |
| 廠商： | Lineage Power |
| 英文描述： | Ringing Access Switch(振鈴存取開關) |
| 中文描述： | 振鈴接入交換機（振鈴存取開關） |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 304K |
| 代理商： | L7581 |
12
Lucent Technologies Inc.
Data Sheet
November 1999
L7581 Ringing Access Switch
Application
12-3074.e (F)
Figure 7. Typical RAS Application, A Version, Idle, or Talk State Shown
Table 12. Truth Table
1. Thermal shutdown mechanism is active with T
SD
floating or equal to 5 V.
2. Forcing T
SD
to ground overrides the logic input pins and forces an all OFF state.
3. Idle/Talk state.
4. Power ringing state.
5. All OFF state.
A parallel in/parallel out data latch is integrated into the L7581. Operation of the data latch is controlled by the logic
level input pin LATCH. The data input to the latch is the INPUT pin of the L7581, and the output of the data latch is
an internal node used for state control.
When the LATCH control pin is at logic 0, the data latch is transparent and data control signals flow directly from
INPUT, through the data latch to state control. Any changes in INPUT will be reflected in the state of the switches.
When the LATCH control pin is at logic 1, the data latch is active—the L7581 will no longer react to changes at the
INPUT control pin. The state of the switches is now latched; that is, the state of the switches will remain as they
were when the LATCH input transitioned from logic 0 to logic 1. The switches will not respond to changes in INPUT
as long as LATCH is held high.
Note that the T
SD
input is not tied to the data latch. T
SD
is not affected by the LATCH input. T
SD
input will override
state control via INPUT and LATCH.
INPUT
0 V
5 V
Don’t Care
T
SD
Tip Break Switch
On
Off
Off
Ring Break Switch
On
Off
Off
Ringing Return Switch
Off
On
Off
Ring Switch
Off
3
On
4
Off
5
5 V/Float
1
5 V/Float
1
0 V
2
CROWBAR
PROTECTION
R1
R2
TIP
RING
SW3
SW4
SW1
SW2
RING
TIP
BATTERY
FEED
RING
GENERATOR
BATTERY
SCR
AND
TRIP
CKT
V
BAT
(REFERENCE)
相關PDF資料 |
PDF描述 |
|---|---|
| L7582 | Ring Access Switch(振鈴存取開關) |
| L7583B | Line Card Access Switch(線卡存取開關) |
| L7583C | Line Card Access Switch(線卡存取開關) |
| L7583D | Line Card Access Switch(線卡存取開關) |
| L7583A | Line Card Access Switch(線卡存取開關) |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| L7581AAE | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecomm/Datacomm |
| L7581AC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecomm/Datacomm |
| L7581BAE | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecomm/Datacomm |
| L7581BC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecomm/Datacomm |
| L7582 | 制造商:AGERE 制造商全稱:AGERE 功能描述:Tip Ring Access Switch |
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